Application of Catalytic Wet Air Oxi【推荐3篇】

Catalytic Wet Air Oxidation (CWAO) is an advanced oxidation process that utilizes a catalyst to enhance the oxidation of organic pollutants in water. This process has gained significant attention in recent years due to its effectiveness in treating various types of wastewater. In this article, we will explore the application of CWAO in industrial wastewater treatment.

Industrial processes generate large volumes of wastewater that contain a wide range of organic compounds, including dyes, pharmaceuticals, and pesticides. These pollutants are often resistant to conventional treatment methods, making it challenging to meet the stringent discharge limits set by regulatory authorities. CWAO offers a promising solution by effectively degrading these organic pollutants into harmless by-products.

The key component of CWAO is the catalyst, which promotes the oxidation reactions. Typically, transition metal oxides such as titanium dioxide (TiO2) or zirconium dioxide (ZrO2) are used as catalysts. These catalysts have high surface area and reactivity, allowing them to efficiently catalyze the oxidation reactions at relatively low temperatures and pressures.

CWAO operates under subcritical conditions, meaning that the reaction occurs below the critical point of water. This allows the process to be conducted at moderate temperatures and pressures, reducing the energy requirements compared to other advanced oxidation processes. Moreover, the use of water as the solvent eliminates the need for hazardous chemicals, making CWAO a more environmentally friendly option.

One of the main advantages of CWAO is its ability to mineralize organic pollutants into carbon dioxide and water. This complete degradation ensures that no harmful by-products or recalcitrant intermediates are formed. As a result, CWAO is highly effective in removing organic pollutants from wastewater, achieving high levels of pollutant removal efficiency.

CWAO has been successfully applied in various industrial sectors such as textile, pharmaceutical, and petrochemical industries. In the textile industry, CWAO has been used to treat wastewater containing dyes, which are known for their high persistence and color intensity. The process effectively removes the dyes, resulting in clear and colorless effluent that meets the regulatory standards.

In the pharmaceutical industry, CWAO has been employed to treat wastewater containing pharmaceutical compounds. These compounds are often resistant to conventional treatment methods, leading to their persistence in the environment. CWAO offers a reliable solution by completely degrading these compounds into harmless substances, ensuring the protection of aquatic ecosystems.

In conclusion, Catalytic Wet Air Oxidation is a promising technology for the treatment of industrial wastewater. Its ability to effectively degrade organic pollutants and its environmental friendliness make it an attractive option for industries seeking sustainable wastewater treatment solutions. With further research and development, CWAO has the potential to revolutionize the field of wastewater treatment and contribute to a cleaner and healthier environment.

Article 2

Contaminated soil poses a significant threat to human health and the environment. It is often contaminated with organic pollutants such as petroleum hydrocarbons, pesticides, and polychlorinated biphenyls (PCBs). These pollutants are persistent and can remain in the soil for long periods, leading to the contamination of groundwater and the potential for bioaccumulation in the food chain.

The traditional methods for soil remediation, such as excavation and landfilling, are costly, time-consuming, and often result in the generation of large amounts of secondary waste. CWAO offers a sustainable and efficient alternative for the remediation of contaminated soil. By promoting the oxidation reactions, CWAO can effectively degrade organic pollutants, minimizing their impact on the environment.

The application of CWAO in soil remediation involves the extraction of contaminated soil, followed by its treatment in a reactor. The extracted soil is mixed with water to form a slurry, which is then subjected to CWAO. The catalyst facilitates the oxidation reactions, breaking down the organic pollutants into harmless by-products. After treatment, the soil can be safely reintroduced into the environment.

CWAO offers several advantages for soil remediation. Firstly, it can treat a wide range of organic pollutants, including those that are highly resistant to degradation. This ensures the complete removal of contaminants from the soil, reducing the risks associated with long-term exposure. Additionally, CWAO can be conducted at ambient temperatures and pressures, minimizing the energy requirements and operational costs.

Furthermore, CWAO eliminates the generation of secondary waste, as the organic pollutants are completely mineralized into carbon dioxide and water. This reduces the overall environmental impact of the remediation process and promotes sustainability. The use of water as the solvent also eliminates the need for hazardous chemicals, making CWAO a safer option for both workers and the environment.

In conclusion, Catalytic Wet Air Oxidation is a promising technology for the remediation of contaminated soil. Its ability to effectively degrade organic pollutants, its sustainability, and its cost-effectiveness make it an attractive option for soil remediation projects. With further research and development, CWAO has the potential to revolutionize the field of soil remediation and contribute to the restoration of contaminated sites.

Application of Catalytic Wet Air Oxi 篇三

Application of Catalytic Wet Air Oxidation to Treatment of Landfill Leachate on Co/Bi Catalyst

Catalytic wet air oxidation(CWAO) was employed to reduce the organic compounds in landfill leachate and the effects of temperature, oxygen pressure, catalyst dosage, and concentration of the or

ganic compounds on the TOC and CODCr removal rates were studied. The degradation kinetics of landfill leachate was also investigated and an exponential experiential model consisting of four influential factors was established to describe the reduction of the organic compounds in the landfill leachate. Meanwhile, the GC-MS technique was used to detect the components of the organic intermediates for the inference of the decomposition mechanisms of the organic compounds in landfill leachate. The results reveal that the reaction temperature and the catalyst dosage are the most important factors affecting the degradation reaction of the organic compounds and that the principal intermediates confirmed by GC-MS are organic acids at a percentage of more than 88% with no aldehydes or alcohols detected. The decomposition mechanisms of the organic compounds in landfill leachate were inferred based on the GC-MS information as follows: the activated gas phase O2 captured the hydrogen of the organic pollutants to produce free radicals, which then initiated the catalytic reaction. So most of the organic compounds were oxidized into CO2 and H2O ultimately. In general, catalytic wet air oxidation over catalyst Co3O4/Bi2O3 was a very promising technique for the treatment of landfill leachate.

作者： LI Hai-Sheng LIU Liang ZHANG Rong DONG De-ming LIU Hong-liang LI Yu 作者单位： LI Hai-Sheng,LIU Hong-liang(College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China)

LIU Liang,ZHANG Rong,DONG De-ming,LI Yu(College of Environment and Resources, Jilin University, Changchun 130023, P. R. China)

刊名：高等学校化学研究（英文版） ISTIC SCI 英文刊名： CHEMICAL RESEARCH IN CHINESE UNIVERSITIES 年，卷(期)： 200420(6) 分类号： O6 关键词： Catalytic wet air oxidation Organic compound Landfill leachate Decomposition mechanism

Application of Catalytic Wet Air Oxi【推荐3篇】

将本文的Word文档下载到电脑，方便收藏和打印

推荐度：

点击下载文档文档为doc格式